// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package llminternal

import (
	"google.golang.org/genai"

	"google.golang.org/adk/agent"
	"google.golang.org/adk/model"
	"google.golang.org/adk/tool"
)

// holds LLMAgent internal state
type Agent interface {
	internal() *State
}

type State struct {
	Model model.LLM

	Tools    []tool.Tool
	Toolsets []tool.Toolset

	IncludeContents string

	GenerateContentConfig *genai.GenerateContentConfig

	Instruction               string
	InstructionProvider       InstructionProvider
	GlobalInstruction         string
	GlobalInstructionProvider InstructionProvider

	DisallowTransferToParent bool
	DisallowTransferToPeers  bool

	InputSchema  *genai.Schema
	OutputSchema *genai.Schema

	OutputKey string
}

type InstructionProvider func(ctx agent.ReadonlyContext) (string, error)

func (s *State) internal() *State { return s }

func Reveal(a Agent) *State { return a.internal() }
